fix: resolve CRLF line ending issue for Windows users

Windows Git converts LF to CRLF by default, causing entrypoint.sh
to fail inside Alpine Linux containers with 'no such file or directory'.

Changes:
- Dockerfile: added sed to strip carriage returns from entrypoint.sh
- .gitattributes: enforce LF line endings for all shell scripts

Fixes #289

.gitattributes

@@ -0,0 +1,4 @@
+# Enforce Unix line endings for shell scripts
+*.sh text eol=lf
+entrypoint.sh text eol=lf
+identifier.sh text eol=lf

Dockerfile

@@ -52,7 +52,9 @@ RUN apk --no-cache upgrade && \
 
 # Copy the compiled binary and entrypoint (--chmod avoids extra RUN chmod layers)
 COPY --from=builder --chmod=755 /app/target/release/oxicloud /usr/local/bin/
-COPY --chmod=755 entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN sed -i 's/\r//' /usr/local/bin/entrypoint.sh && \
+    chmod 755 /usr/local/bin/entrypoint.sh
 
 # Copy processed static files (bundled/minified by build.rs in release)
 COPY --from=builder --chown=oxicloud:oxicloud /app/static-dist /app/static