Add docker build by branch

.dockerignore

@@ -1,23 +0,0 @@
-# Git
-.git
-
-# Systemd files
-systemd
-
-# Logs
-*.log*
-
-# Configs
-*.json
-
-# Byte-compiled / optimized / DLL files
-**/__pycache__
-*.py[cod]
-*$py.class
-*.pyc
-
-# Pyenv
-**/.python-version
-
-# User-specific stuff:
-.idea

docker/.dockerignore

@@ -0,0 +1,2 @@
+# Hooks
+hooks

docker/Dockerfile

@@ -1,13 +1,12 @@
 FROM python:3.6-alpine3.7
 
+# Default branch to master
+ARG BRANCH=master
+
 ENV \
-  # App directory
   APP_DIR=traktarr \
-  # Branch to clone
-  BRANCH=master \
-  # Config file
+  BRANCH=${BRANCH} \
   TRAKTARR_CONFIG=/config/config.json \
-  # Log file
   TRAKTARR_LOGFILE=/config/traktarr.log
 
 RUN \
@@ -15,7 +14,7 @@ RUN \
   apk --no-cache -U upgrade && \
   echo "** Install OS dependencies **" && \
   apk --no-cache -U add git && \
-  echo "** Get Traktarr **" && \
+  echo "** Get Traktarr branch: ${BRANCH} **" && \
   git clone --depth 1 --branch ${BRANCH} https://github.com/l3uddz/traktarr.git /${APP_DIR} && \
   echo "** Install PIP dependencies **" && \
   pip install --no-cache-dir --upgrade pip setuptools && \

docker/hooks/build

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker build --build-arg BRANCH=${SOURCE_BRANCH} -f ${DOCKERFILE_PATH} -t ${IMAGE_NAME} .