Add logging & config; update base images

bulletin-board-app/healthcheck.js

@@ -0,0 +1,24 @@
+var http = require("http");
+
+var options = {
+    host : "localhost",
+    port : "8080",
+    timeout : 2000
+};
+
+var request = http.request(options, (res) => {
+    console.log(`STATUS: ${res.statusCode}`);
+    if (res.statusCode == 200) {
+        process.exit(0);
+    }
+    else {
+        process.exit(1);
+    }
+});
+
+request.on('error', function(err) {
+    console.log('ERROR');
+    process.exit(1);
+});
+
+request.end();