diff --git a/docker/config_env_subst.sh b/docker/config_env_subst.sh
index e18c29fc7..ccd0763c7 100644
--- a/docker/config_env_subst.sh
+++ b/docker/config_env_subst.sh
@@ -8,50 +8,86 @@
 
 contribs=()
 
-# Slack
-if [[ -z "${ENABLE_SLACK}" ]]; then
-    export ENABLE_SLACK="false"
+# Lowercase and set environment variables
+
+# Check and set the PUBLIC_REGISTER_ENABLED variable
+if [[ "${PUBLIC_REGISTER_ENABLED}" == "True" || "${PUBLIC_REGISTER_ENABLED}" == "true" ]]; then
+    export PUBLIC_REGISTER_ENABLED="true"
+else
+    export PUBLIC_REGISTER_ENABLED="false"
 fi
 
-if [ ${ENABLE_SLACK} == "true" ]; then
-    contribs+=('"plugins/slack/slack.json"')
+# Check and set the ENABLE_GITLAB_AUTH variable
+if [[ "${ENABLE_GITLAB_AUTH}" == "True" || "${ENABLE_GITLAB_AUTH}" == "true" ]]; then
+    export ENABLE_GITLAB_AUTH="true"
+else
+    export ENABLE_GITLAB_AUTH="false"
 fi
 
-# Public registration and oauth
-if [[ -z "${PUBLIC_REGISTER_ENABLED}" ]]; then
-    export PUBLIC_REGISTER_ENABLED="false"
+# Check and set the ENABLE_GITHUB_AUTH variable
+if [[ "${ENABLE_GITHUB_AUTH}" == "True" || "${ENABLE_GITHUB_AUTH}" == "true" ]]; then
+    export ENABLE_GITHUB_AUTH="true"
+else
+    export ENABLE_GITHUB_AUTH="false"
 fi
 
+# Check and set the ENABLE_GITHUB_IMPORTER variable
+if [[ "${ENABLE_GITHUB_IMPORTER}" == "True" || "${ENABLE_GITHUB_IMPORTER}" == "true" ]]; then
+    export ENABLE_GITHUB_IMPORTER="true"
+else
+    export ENABLE_GITHUB_IMPORTER="false"
+fi
+
+# Check and set the ENABLE_JIRA_IMPORTER variable
+if [[ "${ENABLE_JIRA_IMPORTER}" == "True" || "${ENABLE_JIRA_IMPORTER}" == "true" ]]; then
+    export ENABLE_JIRA_IMPORTER="true"
+else
+    export ENABLE_JIRA_IMPORTER="false"
+fi
+
+# Check and set the ENABLE_TRELLO_IMPORTER variable
+if [[ "${ENABLE_TRELLO_IMPORTER}" == "True" || "${ENABLE_TRELLO_IMPORTER}" == "true" ]]; then
+    export ENABLE_TRELLO_IMPORTER="true"
+else
+    export ENABLE_TRELLO_IMPORTER="false"
+fi
+
+# Check and set the ENABLE_SLACK variable
+if [[ "${ENABLE_SLACK}" == "True" || "${ENABLE_SLACK}" == "true" ]]; then
+    export ENABLE_SLACK="true"
+else
+    export ENABLE_SLACK="false"
+fi
+
+# Public registration and oauth
 if [ ${PUBLIC_REGISTER_ENABLED} == "true" ]; then
+    # Include GitHub authentication plugin if enabled
     if [ ${ENABLE_GITHUB_AUTH} == "true" ]; then
         contribs+=('"plugins/github-auth/github-auth.json"')
     fi
+    # Include GitLab authentication plugin if enabled
     if [ ${ENABLE_GITLAB_AUTH} == "true" ]; then
         contribs+=('"plugins/gitlab-auth/gitlab-auth.json"')
     fi
 fi
 
-# Importers
-if [[ -z "${ENABLE_GITHUB_IMPORTER}" ]]; then
-    export ENABLE_GITHUB_IMPORTER="false"
-fi
-
-if [[ -z "${ENABLE_JIRA_IMPORTER}" ]]; then
-    export ENABLE_JIRA_IMPORTER="false"
-fi
-
-if [[ -z "${ENABLE_TRELLO_IMPORTER}" ]]; then
-    export ENABLE_TRELLO_IMPORTER="false"
+# Include Slack plugin if enabled
+if [ ${ENABLE_SLACK} == "true" ]; then
+    contribs+=('"plugins/slack/slack.json"')
 fi
 
+# Convert array to a comma-separated string
 contribs=$( IFS=,; echo "[${contribs[*]}]" )
 
+# Set CONTRIB_PLUGINS environment variable
 export CONTRIB_PLUGINS=$contribs
 
+# Check if the configuration file exists, and if not, create it
 FILE=/usr/share/nginx/html/conf.json
 if [ ! -f "$FILE" ]; then
     envsubst < /usr/share/nginx/html/conf.json.template \
              > /usr/share/nginx/html/conf.json
 fi
 
-sed -i 's;<base href="/">;<base href="'"${TAIGA_SUBPATH}/"'">;g' /usr/share/nginx/html/index.html
+# Update base href in the HTML file
+sed -i 's;<base href="/">;<base href="'"${TAIGA_SUBPATH}/"'">;g' /usr/share/nginx/html/index.html
\ No newline at end of file