Use curl-based healthcheck w/ new non-auth route

The wget method seemed to have a possible issue with creating endless
index.html copies (despite being specified to output to console only),
so this has been updated to use curl instead.

Also uses new non-authenticated "healthz" route to perform the
healthcheck.

Fix #316

Fix #313

Dockerfile

@@ -16,7 +16,7 @@ FROM python:3.8-slim
 RUN apt-get update && apt-get install -y \
     libcurl4-openssl-dev \
     tor \
-    wget \
+    curl \
     && rm -rf /var/lib/apt/lists/*
 
 ARG config_dir=/config
@@ -68,6 +68,6 @@ COPY whoogle.env .
 EXPOSE $EXPOSE_PORT
 
 HEALTHCHECK  --interval=30s --timeout=5s \
-  CMD wget -qO- --no-verbose --tries=1 http://localhost:${EXPOSE_PORT}/ || exit 1
+  CMD curl -f http://localhost:${EXPOSE_PORT}/healthz || exit 1
 
 CMD misc/tor/start-tor.sh & ./run

app/routes.py

@@ -110,6 +110,11 @@ def unknown_page(e):
     return redirect(g.app_location)
 
 
+@app.route('/healthz', methods=['GET'])
+def healthz():
+    return ''
+
+
 @app.route('/', methods=['GET'])
 @auth_required
 def index():