no more pointless txt files for version

.docker/app/Dockerfile

@@ -4,12 +4,6 @@ EXPOSE 9000/tcp
 ENV SCRIPT_ROOT=/opt/tt-rss
 ENV SRC_DIR=/src/tt-rss/
 
-ARG BUILD_TIMESTAMP
-ARG CI_COMMIT_BRANCH
-ARG CI_COMMIT_SHORT_SHA
-ARG CI_COMMIT_TIMESTAMP
-ARG CI_COMMIT_SHA
-
 RUN apk add --no-cache dcron php81 php81-fpm php81-phar php81-sockets \
 	php81-pdo php81-gd php81-pgsql php81-pdo_pgsql php81-xmlwriter \
 	php81-mbstring php81-intl php81-xml php81-curl php81-simplexml \
@@ -25,6 +19,21 @@ RUN apk add --no-cache dcron php81 php81-fpm php81-phar php81-sockets \
 			/etc/php81/php-fpm.d/www.conf && \
 	mkdir -p /var/www ${SCRIPT_ROOT}/config.d
 
+ARG BUILD_TIMESTAMP
+ENV BUILD_TIMESTAMP=${BUILD_TIMESTAMP}
+
+ARG CI_COMMIT_BRANCH
+ENV CI_COMMIT_BRANCH=${CI_COMMIT_BRANCH}
+
+ARG CI_COMMIT_SHORT_SHA
+ENV CI_COMMIT_SHORT_SHA=${CI_COMMIT_SHORT_SHA}
+
+ARG CI_COMMIT_TIMESTAMP
+ENV CI_COMMIT_TIMESTAMP=${CI_COMMIT_TIMESTAMP}
+
+ARG CI_COMMIT_SHA
+ENV CI_COMMIT_SHA=${CI_COMMIT_SHA}
+
 ADD --chmod=0755 startup.sh ${SCRIPT_ROOT}
 ADD --chmod=0755 updater.sh ${SCRIPT_ROOT}
 ADD --chmod=0755 dcron.sh ${SCRIPT_ROOT}
@@ -35,10 +44,6 @@ ADD config.docker.php ${SCRIPT_ROOT}
 
 COPY --from=app-src . ${SRC_DIR}
 
-RUN [ ! -z ${BUILD_TIMESTAMP} ] \
-	&& echo ${BUILD_TIMESTAMP}-${CI_COMMIT_BRANCH}-${CI_COMMIT_SHORT_SHA} ${CI_COMMIT_TIMESTAMP} ${CI_COMMIT_SHA} | \
-		tee ${SRC_DIR}/version_static_official.txt
-
 ARG ORIGIN_REPO_XACCEL=https://git.tt-rss.org/fox/ttrss-nginx-xaccel.git
 
 RUN git clone --depth=1 ${ORIGIN_REPO_XACCEL} ${SRC_DIR}/plugins.local/nginx_xaccel