Automtically install MySql in devcontainer for use by existing Go uni…

…t tests.

TESTED by building the devcontainer, following setup instructions from README and finally running `make test`.

.devcontainer/Dockerfile

@@ -0,0 +1,7 @@
+FROM mcr.microsoft.com/devcontainers/base:bullseye
+
+# Install MySql for Go backend unit tests. The tests expect MySql to be
+# installed directly in the development environment rather than in another
+# docker continer such as the dev database used for manual testing.
+COPY install-mysql.sh .
+RUN chmod +x ./install-mysql.sh && ./install-mysql.sh

.devcontainer/devcontainer.json

@@ -1,9 +1,10 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/debian
 {
-	"name": "Debian",
-	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/base:bullseye",
+	"name": "DxE ADB",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
 
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	"features": {

.devcontainer/install-mysql.sh

@@ -0,0 +1,31 @@
+# Original: https://gist.github.com/soubrunorocha/ec30b7704d737a1797b0281e97967834
+
+# Fail if any line fails and return an error so that building this Dockerfile
+# will not swallow the script's errors.
+set -e
+
+#set the root password
+DEFAULTPASS=""
+
+#set some config to avoid prompting
+sudo debconf-set-selections <<EOF
+mysql-community-server mysql-community-server/root-pass password $DEFAULTPASS
+mysql-community-server mysql-community-server/re-root-pass password $DEFAULTPASS
+EOF
+
+#get the mysql repository via wget
+wget https://dev.mysql.com/get/mysql-apt-config_0.8.29-1_all.deb
+
+#set debian frontend to not prompt
+export DEBIAN_FRONTEND=noninteractive
+
+#config the package
+sudo -E dpkg -i mysql-apt-config_0.8.29-1_all.deb
+
+#update apt to get mysql repository
+sudo apt update
+
+#install mysql according to previous config
+sudo -E apt install mysql-server mysql-client --assume-yes --force-yes
+
+rm mysql-apt-config_0.8.29-1_all.deb