Add workflow to build images, modify git/dockerignore

Signed-off-by: Daniel Ekman <knegge@gmail.com>

.dockerignore

@@ -0,0 +1,2 @@
+samples
+

.github/workflows/container.yml

@@ -0,0 +1,59 @@
+name: Container Images
+
+on:
+  push:
+    branches:
+      - 'testing'
+    tags:
+      - 'v*'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Calculate Container Metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/${{ github.repository }}
+
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Setup Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        if: ${{ github.event_name != 'pull_request' }}
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Images
+        if: ${{ github.event_name == 'pull_request' }}
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/amd64, linux/386, linux/arm64, linux/arm/v6, linux/arm/v7
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          
+      - name: Build and Push Images
+        if: ${{ github.event_name != 'pull_request' }}
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/amd64, linux/386, linux/arm64, linux/arm/v6, linux/arm/v7
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache
+          cache-to: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache,mode=max
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.gitignore

@@ -30,3 +30,15 @@
 *.exe
 *.out
 *.app
+
+# Custom config file
+user.env
+user.cfg
+
+# IDE
+.vscode
+.idea
+
+# cmake
+build
+