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Add librsvg to runtime for fast SVG rasterization #21

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Merged
fleveque merged 1 commit into from
May 16, 2026
Merged

Add librsvg to runtime for fast SVG rasterization #21

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6 changes: 5 additions & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -37,12 +37,16 @@ FROM alpine:3.21

# Install only the runtime libraries (not dev headers).
# vips: image processing runtime (libvips)
# librsvg: SVG rasterization backend for libvips — without it, libvips falls
# back to a much slower SVG path. Resizing a single Wikimedia logo to
# all five sizes takes ~30s without librsvg vs ~100ms with it, which
# was tripping kamal-proxy's request timeout.
# ca-certificates: for HTTPS calls to GitHub API and LLM providers
# tzdata: timezone data for proper timestamps
# sqlite: CLI for ad-hoc inspection / cache cleanup via `kamal app exec`
# (the binary uses go-sqlite3, which doesn't need the CLI to run —
# this is purely for operator convenience)
RUN apk add --no-cache vips ca-certificates tzdata sqlite
RUN apk add --no-cache vips librsvg ca-certificates tzdata sqlite

# Run as non-root user for security — same pattern as the dividend-portfolio Dockerfile.
RUN addgroup -S app && adduser -S -G app app
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