Solution to run master branch on docker

contrib/UsingMasterBranch/README.md

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+# Using the `master` branch on your Docker deployment.
+
+## How to use?
+Simply run the script `switch-to-master-and-pull.sh` and everything will be configured for you.
+This script can be put in a cronjob, so your deployment is always on the latest commit from master.

contrib/UsingMasterBranch/opt-add-cheatmode.custom.yml

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+version: "3"
+
+services:
+  btcpayserver:
+    environment:
+      BTCPAY_CHEATMODE: 1

contrib/UsingMasterBranch/opt-master-branch.custom.yml

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+version: "3"
+
+services:
+  nbxplorer:
+    environment:
+      NBXPLORER_EXPOSERPC: 1
+  bitcoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        fallbackfee=0.0002

contrib/UsingMasterBranch/switch-to-master-and-pull.sh

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+#!/bin/bash
+
+############################################################################################################
+# HINT: You can put this script in a cronjob so your deployment can automatically stay current with master #
+############################################################################################################
+
+# TODO This script was only tested on Linux. Other OSes may need adjustments.
+
+# Stop on errors
+set -e
+
+
+if [[ $EUID -ne 0 ]]; then
+   echo "This script must be run as root after running \"sudo su -\""
+   exit 1
+fi
+
+# Navigate to the dir this file is at
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$DIR"
+
+# Go to the parent dir of btcpayserver-docker
+cd ../../..
+
+echo "Resetting after a potential previous run..."
+rm -rf btcpayserver
+
+echo "Cloning using HTTPS so we fetch anonymously and don't run into any potential SSH/pubkey issues..."
+git clone https://github.com/btcpayserver/btcpayserver.git --depth=1
+
+cd btcpayserver
+
+echo "Building a new docker image from source..."
+docker build -f amd64.Dockerfile -t btcpayserver/btcpayserver:master .
+
+echo "Moving on to the docker stuff..."
+cd ../btcpayserver-docker
+
+echo "Copying the 2 fragment YMLs..."
+cp ./contrib/UsingMasterBranch/*.custom.yml ./docker-compose-generator/docker-fragments/
+
+echo "Enabling the 2 fragments..."
+[[ $BTCPAYGEN_ADDITIONAL_FRAGMENTS =~ .*opt-add-cheatmode.custom.* ]] && echo "Fragment 'opt-add-cheatmode.custom' was already added." || export BTCPAYGEN_ADDITIONAL_FRAGMENTS="$BTCPAYGEN_ADDITIONAL_FRAGMENTS;opt-add-cheatmode.custom"
+[[ $BTCPAYGEN_ADDITIONAL_FRAGMENTS =~ .*opt-master-branch.custom.* ]] && echo "Fragment 'opt-master-branch.custom' was already added." || export BTCPAYGEN_ADDITIONAL_FRAGMENTS="$BTCPAYGEN_ADDITIONAL_FRAGMENTS;opt-master-branch.custom"
+
+echo "Setting the image to the one we just built..."
+export BTCPAY_IMAGE="btcpayserver/btcpayserver:master"
+
+echo "Updating BTCPay deployment to the latest version (might be needed to work with the master branch)..."
+./btcpay-update.sh
+
+echo "Applying the new config..."
+. btcpay-setup.sh -i
+
+echo "Making sure we're up and running..."
+./btcpay-up.sh