Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/start_up.sh

@@ -0,0 +1,54 @@
+#! /bin/sh
+
+# Required script variables 
+APP_NAME=${APP_NAME:-'streamline'}
+export MYSQL_DATABASE=${DB_DATABASE:-'streamline'}
+export MYSQL_USER=${DB_USERNAME:-'root'}
+export MYSQL_PASSWORD=${DB_PASSWORD:-'streamline'}
+export MYSQL_ROOT_PASSWORD=${DB_ROOT_PASSWORD:-'streamline'}
+
+# execute run.sh script for MySQL initialisation
+chmod +x .docker/mysql/mysql-init.sh
+
+# run the MariaDB initilisation script
+./.docker/mysql/mysql-init.sh
+if [ $? -eq 0 ]; then
+
+    echo "[info] MySQL server started. checking for '$MYSQL_DATABASE' database. "
+
+    mysql -u $MYSQL_USER -p$MYSQL_PASSWORD -e "use streamline;"
+
+    # Guard condition to re-check existence of database schema
+    # If it doesnt exist, create it and import streamline_initial.sql file
+    if [ $? -eq 1 ]; then
+
+        mysql -u $MYSQL_USER -p$MYSQL_PASSWORD -e "CREATE DATABASE $MYSQL_DATABASE;"
+
+        if [ $? -eq 0 ]; then
+            echo "[info] Database: $MYSQL_DATABASE created."
+
+            mysql -u $MYSQL_USER -p$MYSQL_PASSWORD $MYSQL_DATABASE < ./.docker/mysql/scripts/streamline_initial.sql
+            if [ $? -eq 0 ]; then
+                echo "[info] populated database."
+            else
+                echo "[error] database not populated."
+            fi
+
+        else
+            echo "[error] database not created."
+        fi
+
+    else
+        echo "[info] Database: $MYSQL_DATABASE exists. "
+    fi
+
+    echo "[info] starting $APP_NAME ..."
+
+    php /var/www/html/artisan serve --host=0.0.0.0 --port=80
+
+else
+    echo "[error] MariaDB server couldnt be started."
+
+    # terminate script if database isnt running
+    exit 1;
+fi