feat(action): try use output variables

.forgejo/dotnet-build/action.yml

@@ -0,0 +1,20 @@
+inputs:
+  idk:
+  # input-one:
+  #   default: 'one'
+  #   description: 'description one'
+  # input-two-required:
+  #   description: 'description two'
+  #   required: true
+outputs:
+  key:
+    description: 'output value'
+    value: "${{ steps.one.outputs.key }}"
+
+runs:
+  using: "composite"
+  steps:
+    - name: From the dotnet-build action
+      run: |
+        ls -la
+        echo tee hee ${{ inputs.idk }}

.forgejo/workflows/demo.yaml

@@ -0,0 +1,23 @@
+on: [push]
+jobs:
+  # test:
+  #   runs-on: docker
+  #   steps:
+  #     - run: echo All good!
+  checkout:
+    runs-on: self-hosted
+    env:
+      test: value
+    steps:
+      # - name: checkout
+      #   run: |
+      #       git checkout
+      - name: Output and set some-result.test
+        id: some-result
+        run: |
+          echo ${{ env.test }}
+          echo 'test=good' >> $FORGEJO_OUTPUT
+      - name: Output updated env.test?
+        run: |
+          echo ${{ steps.some-result.outputs.test }}
+          test ${{ steps.some-result.outputs.test }} = good

containers/forgejo/docker-compose.yml

@@ -0,0 +1,28 @@
+version: '3.8'
+
+services:
+  docker-in-docker:
+    image: docker:dind
+    container_name: 'docker_dind'
+    privileged: 'true'
+    command: ['dockerd', '-H', 'tcp://0.0.0.0:2375', '--tls=false']
+    restart: 'unless-stopped'
+
+  runner:
+    image: 'data.forgejo.org/forgejo/runner:13'
+    # commented out because links aren't supported and I'm not sure why the docs
+    # even has it
+    # links:
+    #   - docker-in-docker
+    depends_on:
+      docker-in-docker:
+        condition: service_started
+    container_name: 'runner'
+    environment:
+      DOCKER_HOST: tcp://docker-in-docker:2375
+    # User without root privileges, but with access to `./data`.
+    user: 1001:1001
+    volumes:
+      - ./data:/data
+    restart: 'unless-stopped'
+    command: 'forgejo-runner daemon --config runner-config.yml'