attempting to fix docker image build by generating frontend version information before docker build.

webapp/frontend/git.version.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+if [[ -z "${CI}" ]]; then
+    echo "running locally (not in Github Actions). generating version file from git client"
+    GIT_TAG=`git describe --tags`
+    GIT_BRANCH=`git rev-parse --abbrev-ref HEAD`
+
+    if [[ "$GIT_BRANCH" == "master" ]]; then
+        VERSION_INFO="${GIT_TAG}"
+    else
+        VERSION_INFO="${GIT_BRANCH}#${GIT_TAG}"
+    fi
+else
+    echo "running in Github Actions, generating version file from environmental variables"
+    # https://docs.github.com/en/actions/learn-github-actions/environment-variables
+    GITHUB_SHA
+    GITHUB_REF_NAME
+    GITHUB_REF_TYPE
+
+    VERSION_INFO="${GITHUB_REF_NAME}"
+
+    if [[ "$GITHUB_REF_TYPE" == "branch" ]]; then
+            VERSION_INFO="${VERSION_INFO}#${GITHUB_SHA::7}"
+    fi
+fi
+
+echo "writing version file (version: ${VERSION_INFO})"
+cat <<EOT > src/environments/versions.ts
+// this file is automatically generated by git.version.ts script
+export const versionInfo = {
+    version: '${VERSION_INFO}',
+};
+EOT