Start of Docker bits

Author: Nick Craver

.github/workflows/main.yml

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+name: Main Build
+
+on:
+  pull_request:
+  push:
+    branches:
+    - main
+    paths:
+    - '*'
+    - '!/docs/*' # Don't run workflow when files are only in the /docs directory
+
+jobs:
+  vm-job:
+    name: Ubuntu
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres
+        ports:
+        - 5432/tcp
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: test
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
+      sqlserver:
+        image: mcr.microsoft.com/mssql/server:2017-latest-ubuntu
+        ports:
+        - 1433/tcp
+        env:
+          ACCEPT_EULA: Y
+          SA_PASSWORD: g0d4mm!tSQLServer
+      mysql:
+        image: mysql
+        ports:
+        - 3306/tcp
+        env:
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: test
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v1
+    - name: .NET Build
+      run: dotnet build Build.csproj -c Release /p:CI=true
+    - name: .NET Test
+      run: dotnet test Build.csproj -c Release --no-build /p:CI=true
+      env:
+        EnableTestLogging: true
+        MySQLConnectionString: server=localhost;Port=${{ job.services.mysql.ports[3306] }};Uid=root;Pwd=root;Database=test;Allow User Variables=true
+        PostgreSqlConnectionString: Server=localhost;Port=${{ job.services.postgres.ports[5432] }};Database=test;User Id=postgres;Password=postgres;
+        SQLServerConnectionString: Server=tcp:127.0.0.1,${{ job.services.sqlserver.ports[1433] }};Database=tempdb;User Id=sa;Password=g0d4mm!tSQLServer;
+    - name: .NET Lib Pack
+      run: dotnet pack Build.csproj --no-build -c Release /p:PackageOutputPath=%CD%\.nupkgs /p:CI=true

tests/docker-compose.yml

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+version: "3"
+services:
+  mysql:
+    image: mysql:8
+    container_name: mysql
+    ports:
+      - 3306:3306
+    environment:
+      MYSQL_ROOT_PASSWORD: root
+      MYSQL_DATABASE: test
+  postgres:
+    image: postgres:alpine
+    container_name: postgres
+    ports:
+      - 5432:5432
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: test
+  sqlserver:
+    image: microsoft/mssql-server-linux:2019-latest
+    container_name: sql-server-db
+    ports:
+      - 1433:1433
+    environment:
+      ACCEPT_EULA: Y
+      SA_PASSWORD: "saAccountI#v3rySecure"