Fix line endings.

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = crlf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.sh]
+end_of_line = lf
+
+[*.md]
+trim_trailing_whitespace = false

Dockerfile

@@ -34,7 +34,9 @@ RUN \
   apk --no-cache del .build-deps
 
 COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint
-RUN chmod +x /usr/local/bin/docker-entrypoint
+RUN \
+  chmod +x /usr/local/bin/docker-entrypoint && \
+  sed -i 's,\r,,g' /usr/local/bin/docker-entrypoint
 
 RUN \
   for path in \