Try to fix Dockerfile.

Dockerfile

@@ -21,22 +21,22 @@ ARG TRUSTED_URL
 # Set the environment variables (defaults where required)
 # 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 BUILD_DEPS="apt-utils gnupg gosu wget curl bzip2 build-essential python git ca-certificates gcc-7" \
+    NODE_VERSION=v8.12.0 \
+    METEOR_RELEASE=1.6.0.1 \
+    USE_EDGE=false \
+    METEOR_EDGE=1.5-beta.17 \
+    NPM_VERSION=latest \
+    FIBERS_VERSION=2.0.0 \
+    ARCHITECTURE=linux-x64 \
+    SRC_PATH=./ \
+    WITH_API=true \
+    MATOMO_ADDRESS="" \
+    MATOMO_SITE_ID="" \
+    MATOMO_DO_NOT_TRACK=false \
+    MATOMO_WITH_USERNAME=true \
+    BROWSER_POLICY_ENABLED=true \
+    TRUSTED_URL=""
 
 # Copy the app to the image
 COPY ${SRC_PATH} /home/wekan/app