Replace Travis with GHA

.github/workflows/BuildImage.yml

@@ -0,0 +1,30 @@
+name: Build Image
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  build:
+    env:
+      DOCKERHUB: "linuxserver/mods" #don't modify
+      BASEIMAGE: "baseimagename" #replace
+      MODNAME: "modname" #replace
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.3
+
+      - name: Build image
+        id: build
+        run: |
+          docker build --no-cache -t ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }} .
+
+      - name: Push image
+        if: ${{ github.ref == format('refs/heads/{0}-{1}', env.BASEIMAGE, env.MODNAME) }}
+        run: |
+          # Tag image
+          docker tag ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }} ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}
+          # Login to DockerHub
+          echo ${{ secrets.DOCKERPASS }} | docker login -u ${{ secrets.DOCKERUSER }} --password-stdin
+          # Push all of the tags
+          docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}-${{ github.sha }}
+          docker push ${DOCKERHUB}:${BASEIMAGE}-${MODNAME}

README.md

@@ -12,6 +12,6 @@ If adding multiple mods, enter them in an array separated by `|`, such as `DOCKE
 * Edit the `Dockerfile` for the mod. `Dockerfile.complex` is only an example and included for reference; it should be deleted when done.
 * Inspect the `root` folder contents. Edit, add and remove as necessary.
 * Edit this readme with pertinent info, delete these instructions.
-* Finally edit the `travis.yml`. Customize the build branch, and the vars for `BASEIMAGE` and `MODNAME`.
+* Finally edit the `.github/workflows/BuildImage.yml`. Customize the build branch, and the vars for `BASEIMAGE` and `MODNAME`.
 * Ask the team to create a new branch named `<baseimagename>-<modname>`. Baseimage should be the name of the image the mod will be applied to. The new branch will be based on the `template` branch.
 * Submit PR against the branch created by the team.