Make the uWSGI http-timeout configurable

When testing Promenade integration, I found that it was taking more than
the default 60 second timeout to render documents.

Change-Id: Id0ee7ea30b901a60eb95df06a3d25ce4c8689a8a

charts/deckhand/templates/deployment.yaml

@@ -45,6 +45,8 @@ spec:
       containers:
         - name: deckhand
           env:
+            - name: 'DECKHAND_API_TIMEOUT'
+              value: {{ .Values.conf.uwsgi.timeout | default 600 | quote }}
             - name: 'DECKHAND_API_WORKERS'
               value: {{ .Values.conf.uwsgi.workers | default 4 | quote }}
             - name: 'DECKHAND_API_THREADS'

entrypoint.sh

@@ -18,6 +18,8 @@ set -ex
 
 # Define port
 PORT=${PORT:-9000}
+# How long uWSGI should wait for each deckhand response
+DECKHAND_API_TIMEOUT=${DECKHAND_API_TIMEOUT:-"600"}
 # Number of uWSGI workers to handle API requests
 DECKHAND_API_WORKERS=${DECKHAND_API_WORKERS:-"4"}
 # Threads per worker
@@ -28,6 +30,7 @@ exec uwsgi \
     --http :${PORT} \
     -w deckhand.cmd \
     --callable deckhand_callable \
+    --http-timeout $DECKHAND_API_TIMEOUT \
     --enable-threads \
     -L \
     --pyargv "--config-file /etc/deckhand/deckhand.conf" \