Add container image for golang fyne.io ci

Signed-off-by: Heathcliff <[email protected]>

.github/workflows/build-go-fyne-ci.yaml

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+---
+name: Build go-fyne-ci
+
+on:
+  workflow_dispatch:
+  workflow_call:
+  push:
+    branches: [main]
+    paths:
+      - "apps/go-fyne-ci/Dockerfile"
+  pull_request:
+    branches: [main]
+    paths:
+      - "apps/go-fyne-ci/Dockerfile"
+      - ".github/workflows/build-go-fyne-ci.yaml"
+  merge_group:
+    branches: ["main"]
+
+jobs:
+  build:
+    uses: ./.github/workflows/build.yaml
+    permissions:
+      contents: read
+      packages: write
+    with:
+      app: go-fyne-ci
+      dry-run: ${{ github.event_name == 'pull_request' || github.event_name == 'merge_group' }}
+    secrets: inherit

apps/go-fyne-ci/Dockerfile

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+FROM docker.io/library/golang:1.21.6@sha256:7026fb72cfa9cc112e4d1bf4b35a15cac61a413d0252d06615808e7c987b33a7
+
+# renovate: datasource=github-releases depName=golangci/golangci-lint
+ARG GOLANGCI_LINT_VERSION=v1.55.2
+
+RUN apt-get update && apt-get install -y gcc libgl1-mesa-dev xorg-dev && apt-get clean
+
+RUN go install github.com/golangci/golangci-lint/cmd/golangci-lint@${GOLANGCI_LINT_VERSION}
+
+WORKDIR /app

apps/go-fyne-ci/README.md

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+# go-fyne-ci
+
+Simple image useful for ci related jobs when developing fyne.io apps.
+
+Contains all the necessary dependencies, golang as well as golangci-lint.