We used FORCE using Docker (version 20.10.17 build 100c701) to work on a "prebuilt image" which can be "easily" pulled on a Linux-based system. 
We used Ubuntu 21.10 for our processing.
Prior to downloading the data we made sure of sufficient storage for mass processing of the data heavy satellite images.

Reference - Frantz, D. (2019): FORCE – Landsat + Sentinel-2 Analysis Ready Data and beyond: Remote Sensing 11, 1124. http://doi.org/10.3390/rs11091124

For a detailed force installation tutorial refer to https://force-eo.readthedocs.io/en/latest/
Please exchange and adjust everything to your specific system and filenames depending of you are using Docker or not.

###############################################
Pulling a docker image of latest force version
(We used davidfrantz/force:3.7.7 version)
###############################################

sudo docker pull \
	davidfrantz/force

###############################################
Running force
###############################################

sudo docker run \
	davidfrantz/force

###############################################
Dependencies and requirements
###############################################

A list of dependencies and requirements specific to Force should be installed. 
Refer to these links below
1.https://force-eo.readthedocs.io/en/latest/setup/depend.html
2.https://force-eo.readthedocs.io/en/latest/setup/requirements.html

#####################################
# 1. set up the working environment
#####################################

cd /home/myproject

#create all kind of needed directories
mkdir -p level1/level1-datapool/Landsat
mkdir -p level1/meta/
mkdir level2
mkdir catalog
mkdir param
mkdir log
mkdir misc
mkdir temp
mkdir level2/base

# Download metadata catalog once before first use
force-level1-csd -u catalog/

## prior to data download either
a. Save the study area shapefile in misc directory
or b. select the tilenames (for Sentinel-2) and path/row numbers (for Landsat)

#####################################################
# 2. Download level 1 Sentinel2 and Landsat data
#####################################################

#2.1 download sentinel 2 data for 2017 to 2021 using study area shapefile
# Note: First Docker command needs to use the Docker credentials
sudo docker run -v /home/myproject:/opt/data --user "$yourusername" --env FORCE_CREDENTIALS=/app/credentials -v $HOME:/app/credentials davidfrantz/force force-level1-csd -c 0,75 -d 20170101,20211231 -s S2A,S2B /opt/data/catalog/ /opt/data/level1/level1-datapool/ /opt/data/level1/level1-datapool/queue.txt /opt/data/misc/mystudyarea_shapefile.shp

#2.2 download landsat data using landsatlinks
## --> make an account and request permission to download e.g. get "machine to machine" API
## create a file with your user credentials
## a simple .txt file first row username, second row password ### think of special character readability
## save the study area shapefile in the misc directory
## we used landsatlinks version 1.0.0 https://github.com/ernstste/landsatlinks

# 2.2.1 create file with download links for Landsat using landsatlinks:
landsatlinks search /home/myproject/misc/mystudyarea_shapefile.shp /home/myproject/misc -s OLI -d 20220101,20221231 -m 1,2,3,4,5,6,7,8,9,10,11,12 -c 0,75 --secret /home/myproject/misc/landsatlink.txt -q /home/myproject/misc/landsat_download_links.txt

-d = daterange
-m = month
-s = sensor
-c = cloud cover
-q = queue file
--secret = path to the login credentials (Earth Explorer login)

Reference to the landsatlinks github repository:  https://github.com/ernstste/landsatlinks

#2.2.2 In the misc folder access the download URLS written as a .txt file:
cat /home/myproject/misc/urls_landsat_OLI_20230130T143754.txt| xargs -n 1 -P 50 wget -q -P /home/myproject/level1/level1-datapool/Landsat/landsatlinks --content-disposition
ATTENTION: Please note, that the TXT file needs to be exchange for your project related file. This is just an example file mentioned here!

#2.2.3 Unzip all the downloaded .tar files in the respective landsatlinks folder:

cd /home/myproject/level1/level1-datapool/Landsat/landsatlinks
for f in *.tar; do 
y=${f%.tar} 
mkdir $y 
sudo tar -xf "$f" -C $y; done

###################################
# 3. Landsat ARD
###################################

# 3.1 DEM
# provide a DEM for enhanced cloud and cloud shadow detection, atmospheric correction, and to perform the topographic correction
# download DEM of your choice, we recommend ASTER/SRTM 1-arc second (30m) global from USGS earthexplorer or NASA Earthdata
# built vrt with force
find misc/dem/ -name '*.tif' > misc/dem/srtm.txt
gdalbuildvrt -input_file_list misc/dem/srtm.txt misc/dem/srtm.vrt

# 3.2 Download parameter file
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-parameter /opt/data/param/landsat_level2.prm LEVEL2

## The sample parameter file is attached with the data (landsat_level2.prm)

# 3.3 create a queue file (.txt format) in the following structure:
/opt/data/level1/level1-datapool/landsat/landsatlinks/name_of_landsat_file QUEUED
## update the path of the queue file in the parameter file

# 3.4 Force Level2 processing
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-level2 /opt/data/param/landsat_level2.prm

####################################
# 4. Landsat base image
####################################

# 4.1 Download parameter file
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-parameter /opt/data/param/ls_base.prm TSA

# 4.2 get Tile extent
## get the coordinates for the TSA prm file
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-tile-extent /opt/data/misc/mystudyarea_shapefile.shp /opt/data/level2/ /opt/data/level2/base/TSA_extent_info.txt

## The sample parameter file is attached with the data (ls_base.prm)

# 4.3 Force Level3
## add additional tile extent in the params file so all folders are read in 2 extra in each direction
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-higher-level /opt/data/param/ls_base.prm 

# 4.4 base image mosaic
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-mosaic /opt/data/level2/base/

####################################
# 5. Sentinel2 Level2 ARD
####################################

# 5.1 Download parameter file
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-parameter /opt/data/param/sentinel_level2.prm LEVEL2

# 5.2 Force level 2 and coregistration
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-level2 /opt/data/param/sentinel_level2.prm

## The sample parameter file is attached with the data (sentinel_level2.prm)

# 5.3 Create report
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-level2-report /opt/data/log/

########################################
# 6. Sentinel2 Time-Series-Analysis (TSA) and indices Level3
########################################

#6.1 parameter file TSA
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-parameter /opt/data/param/sentinel_level3.prm TSA

# 6.2 Force Sentinel Level3 TSA monthly aggregates
#add additional tile extent in the params file so all folders are read in 2 extra in each direction
sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-higher-level /opt/data/param/sentinel_level3.prm

## for monthly aggregates use FBM = TRUE 

## for yearly aggregates use FBY = TRUE (here date range is only one year)

## for multi annual aggregates FBY = TRUE AND!
##Under "PROCESSING TIMEFRAME" adjust to more than one year
##DATE_RANGE to 2017-01-01-2021-12-31 

## The sample parameter file is attached with the data (sentinel_level3.prm)

####################################
# 7. Sentinel2 mosaic/vrt
####################################

sudo docker run -v /home/myproject:/opt/data davidfrantz/force force-mosaic /opt/data/level3/