Add uninstall script (#734)

btcpay-teardown.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+set +x
+
+if [[ "$0" = "$BASH_SOURCE" ]]; then
+    echo "This script must be sourced \". btcpay-teardown.sh\""
+    exit 1
+fi
+
+if [[ $EUID -ne 0 ]]; then
+    echo "This script must be run as root after running \"sudo su -\""
+    return
+fi
+
+# Verify we are in right folder. If we are not, let's go in the parent folder of the current docker-compose.
+if ! git rev-parse --git-dir &> /dev/null || [ ! -d "Generated" ]; then
+    if [[ ! -z $BTCPAY_DOCKER_COMPOSE ]]; then
+        cd $(dirname $BTCPAY_DOCKER_COMPOSE)
+        cd ..
+    fi
+    if ! git rev-parse || [[ ! -d "Generated" ]]; then
+        echo "You must run this script inside the git repository of btcpayserver-docker"
+        return
+    fi
+fi
+
+printf "\n🚨 Running this script will completely erase the BTCPay Server instance. Do you wish to perform this action?\n\n"
+
+read -p "➡️  Confirm by typing 'YES': " confirm
+
+if [[ "$confirm" != "YES"* ]]; then
+  printf "\n😌 Phew, that was close. Aborting uninstall — thanks for keeping your BTCPay Server!\n\n"
+  return
+else
+  printf "\n👋 Sad to see you go. Thanks for using BTCPay Server!\n"
+fi
+
+BASH_PROFILE_SCRIPT="/etc/profile.d/btcpay-env.sh"
+ORIGINAL_DIRECTORY="$(pwd)"
+BTCPAY_BASE_DIRECTORY="$(dirname "$(pwd)")"
+
+printf "\nℹ️  Stopping BTCPay Server and removing related Docker volumes and networks …\n\n"
+docker-compose -f $BTCPAY_DOCKER_COMPOSE down -v
+docker system prune -f
+
+printf "\nℹ️  Removing BTCPay Server files …\n\n"
+cd $BTCPAY_BASE_DIRECTORY
+rm -rf $ORIGINAL_DIRECTORY
+rm $BASH_PROFILE_SCRIPT $BTCPAY_ENV_FILE
+
+printf "\n✅ Teardown done, successfully uninstalled BTCPay Server!\n\n"