[Feat] 12 factored env vars for the form app

Docker/canap_apache.conf

+PassEnv DB_HOST DB_NAME DB_USER DB_PASSWORD
+PassEnv SENDEMAILS MAIL_FROM MAIL_CONTACT MAIL_REPLYTO
+PassEnv ENVIRONMENT
+PassEnv FILESERVERPATH
\ No newline at end of file

Docker/docker-entrypoint-gest.sh

+#!/bin/sh
+
+set -e -x
+
+# Substitute 12-factored env vars now (we couldn't do that at compile time
+# because we don't know the values until runtime).
+# sed -i -e "s|_REPLACE_ME_LATER__API_LOCATION|$API_LOCATION|"      \
+#        -e "s|_REPLACE_ME_LATER__LOGIN_REDIRECT|$LOGIN_REDIRECT|"  \
+#        /usr/local/apache2/htdocs/gest/js/app.*.js
+
+exec /usr/local/bin/httpd-foreground