Try to fix Docker env variables.

Dockerfile

@@ -22,21 +22,21 @@ ARG TRUSTED_URL
 # DOES NOT WORK: paxctl fix for alpine linux: https://github.com/wekan/wekan/issues/1303
 # ENV BUILD_DEPS="paxctl"
 ENV BUILD_DEPS="apt-utils gnupg gosu wget curl bzip2 build-essential python git ca-certificates gcc-7"
-ENV NODE_VERSION ${NODE_VERSION:-v8.12.0}
-ENV METEOR_RELEASE ${METEOR_RELEASE:-1.6.0.1}
-ENV USE_EDGE ${USE_EDGE:-false}
-ENV METEOR_EDGE ${METEOR_EDGE:-1.5-beta.17}
-ENV NPM_VERSION ${NPM_VERSION:-latest}
-ENV FIBERS_VERSION ${FIBERS_VERSION:-2.0.0}
-ENV ARCHITECTURE ${ARCHITECTURE:-linux-x64}
-ENV SRC_PATH ${SRC_PATH:-./}
-ENV WITH_API ${WITH_API:-true}
-ENV MATOMO_ADDRESS ${MATOMO_ADDRESS:-}
-ENV MATOMO_SITE_ID ${MATOMO_SITE_ID:-}
-ENV MATOMO_DO_NOT_TRACK ${MATOMO_DO_NOT_TRACK:-false}
-ENV MATOMO_WITH_USERNAME ${MATOMO_WITH_USERNAME:-true}
-ENV BROWSER_POLICY_ENABLED ${BROWSER_POLICY_ENABLED:-true}
-ENV TRUSTED_URL ${TRUSTED_URL:-}
+ENV NODE_VERSION ${NODE_VERSION:-"v8.12.0"}
+ENV METEOR_RELEASE ${METEOR_RELEASE:-"1.6.0.1"}
+ENV USE_EDGE ${USE_EDGE:-"false"}
+ENV METEOR_EDGE ${METEOR_EDGE:-"1.5-beta.17"}
+ENV NPM_VERSION ${NPM_VERSION:-"latest"}
+ENV FIBERS_VERSION ${FIBERS_VERSION:-"2.0.0"}
+ENV ARCHITECTURE ${ARCHITECTURE:-"linux-x64"}
+ENV SRC_PATH ${SRC_PATH:-"./"}
+ENV WITH_API ${WITH_API:-"true"}
+ENV MATOMO_ADDRESS ${MATOMO_ADDRESS:-""}
+ENV MATOMO_SITE_ID ${MATOMO_SITE_ID:-""}
+ENV MATOMO_DO_NOT_TRACK ${MATOMO_DO_NOT_TRACK:-"false"}
+ENV MATOMO_WITH_USERNAME ${MATOMO_WITH_USERNAME:-"true"}
+ENV BROWSER_POLICY_ENABLED ${BROWSER_POLICY_ENABLED:-"true"}
+ENV TRUSTED_URL ${TRUSTED_URL:-""}
 
 # Copy the app to the image
 COPY ${SRC_PATH} /home/wekan/app