added ability to check out alternate branch

docker/production/dockerfile

@@ -1,5 +1,7 @@
 # arguments
 ARG VERSION="master"
+# Branch to check out
+ARG CHECKOUT_BRANCH="master"
 
 FROM node:current-alpine AS build
 
@@ -35,8 +37,8 @@ ENV PROJECT_NAME="headscale-ui"
 # URL for the github/git location
 ENV PROJECT_URL="https://github.com/gurucomputing/headscale-ui"
 # Ports that caddy will run on
-ENV HTTPS_PORT="443"
 ENV HTTP_PORT="80"
+ENV HTTPS_PORT="443"
 
 # Production Web Server port. Runs a self signed SSL certificate
 EXPOSE 443

docker/production/scripts/1-image-build.sh

@@ -8,9 +8,10 @@ apk add --no-cache jq git
 
 #clone the project
 git clone ${PROJECT_URL} ${PROJECT_NAME}
+cd ${PROJECT_NAME}
+git checkout ${CHECKOUT_BRANCH}
 
 # install the project
-cd ${PROJECT_NAME}
 npm install
 
 # inject the version number