security: add baseline security headers to nginx config#75
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Adds Strict-Transport-Security, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, and a minimal frame-ancestors Content-Security-Policy to the server block. Headers are repeated in the cache-control and /health locations because nginx add_header inheritance is replace-not-merge per location. Closes #74
rubenhensen
approved these changes
May 11, 2026
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Summary
Adds the baseline HTTP security headers requested in #74 to
nginx.conf:Strict-Transport-Security: max-age=31536000; includeSubDomainsX-Content-Type-Options: nosniffX-Frame-Options: DENYReferrer-Policy: strict-origin-when-cross-originContent-Security-Policy: frame-ancestors 'none'Headers are attached with
alwaysso they apply to error responses too. Because nginxadd_headeris replace-not-merge per location, the same block is repeated in the cache-control location (hashed assets) and/health. A more elaboratescript-src/style-srcCSP is left for a follow-up since VitePress and Mermaid use inline scripts and styles.Closes #74.
Verification
npm run docs:buildpasses (6.95s, mermaid output intact).Reviewer quickstart:
git fetch origin && git checkout security/nginx-headers && docker build -t pgdocs-test . && docker run --rm -p 8080:80 pgdocs-testthencurl -sI http://localhost:8080/ | grep -iE 'strict-transport|x-frame|x-content-type|referrer-policy|content-security-policy'.