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* harden: non-root container with tini, healthcheck, and a robust entrypoint entrypoint.sh: escape sed metacharacters (\, &, #) so any future DocSearch value substitutes literally instead of crashing the pass or corrupting the bundle; rewrite only files that still contain the placeholder, making restarts no-ops; on substitution failure, log a warning and start the server anyway rather than crash-looping under restart: unless-stopped. Dockerfile: run as the built-in non-root node user (artifacts chowned so the runtime sed keeps write access); add tini as PID 1 so SIGTERM actually reaches node and docker stop takes ~1s instead of the 10s kill grace; add a HEALTHCHECK so a dead server shows as unhealthy instead of silently Up. Container-tested: boots 202ms, all routes/assets/redirects OK, metacharacter-laden values injected literally, uid 1000, health reaches healthy, restart idempotent (no rewrites, value intact), docker stop 0s. * harden: substitute DocSearch placeholders independently; strip CR/LF from values Review findings: the three substitutions were &&-chained, so one failing value skipped the remaining valid ones; and a raw newline in a value breaks the single-line sed command. Run each substitution independently, accumulating failures into one warning, and strip CR/LF in escape() (no legitimate DocSearch token contains them). Container-tested: newline-laden appId is sanitized and all three placeholders still apply with no warning; forced full failure logs all three sed errors plus one warning and the server still starts healthy. --------- Co-authored-by: Brandon Hopkins <brandon@techhut.tv>
48 lines
2.0 KiB
Bash
48 lines
2.0 KiB
Bash
#!/bin/sh
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# Substitutes the APP_NEXT_PUBLIC_DOCSEARCH_* placeholders baked into the
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# client bundle at build time (from the committed .env) with the real values
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# passed via the container environment, then starts the server.
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#
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# NEXT_PUBLIC_* values are compiled into the client bundle, so this rewrite is
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# what lets one image serve any environment's DocSearch credentials.
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set -eu
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NEXT_PUBLIC_DOCSEARCH_APP_ID=${NEXT_PUBLIC_DOCSEARCH_APP_ID:-"none"}
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NEXT_PUBLIC_DOCSEARCH_API_KEY=${NEXT_PUBLIC_DOCSEARCH_API_KEY:-"none"}
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NEXT_PUBLIC_DOCSEARCH_INDEX_NAME=${NEXT_PUBLIC_DOCSEARCH_INDEX_NAME:-"none"}
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# Escape the characters that are special in a sed replacement (\ and &) and
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# our s### delimiter (#), so values containing them substitute literally.
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# CR/LF are stripped first: a one-line s### command cannot carry a raw
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# newline, and no legitimate DocSearch token contains one.
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escape() {
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printf '%s' "$1" | tr -d '\r\n' | sed -e 's/[\\&#]/\\&/g'
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}
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# Rewrite only the files that still contain the placeholder — after the first
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# boot substituted everything, restarts touch nothing. grep exiting 1 on zero
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# matches is fine: xargs -r then runs nothing and the pipeline succeeds.
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substitute() {
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grep -rlZ "$1" /usr/app/.next | xargs -0 -r sed -i "s#$1#$2#g"
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}
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# Each substitution runs independently: one failing value must not stop the
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# remaining placeholders from being applied.
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ok=1
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substitute APP_NEXT_PUBLIC_DOCSEARCH_APP_ID "$(escape "$NEXT_PUBLIC_DOCSEARCH_APP_ID")" || ok=0
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substitute APP_NEXT_PUBLIC_DOCSEARCH_API_KEY "$(escape "$NEXT_PUBLIC_DOCSEARCH_API_KEY")" || ok=0
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substitute APP_NEXT_PUBLIC_DOCSEARCH_INDEX_NAME "$(escape "$NEXT_PUBLIC_DOCSEARCH_INDEX_NAME")" || ok=0
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if [ "$ok" = 1 ]; then
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echo "DocSearch configuration applied"
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else
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# Serve the docs even if search wiring failed — a docs site with broken
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# search beats a crash-looping container. The warning makes it visible.
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echo "WARNING: DocSearch placeholder substitution failed; search may be broken" >&2
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fi
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echo "starting Next.js"
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exec "$@"
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