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feat(tts): add pocket-tts engine alongside kokoro-fastapi
- New backend/internal/pockettts package: POST /tts client for
  kyutai-labs/pocket-tts; streams WAV response and transcodes to MP3
  via ffmpeg so the rest of the pipeline stays format-agnostic
- config.PocketTTS struct + POCKET_TTS_URL env var
- runner.Dependencies.PocketTTS field; runAudioTask routes by voice name:
  pockettts.IsPocketTTSVoice (alba, marius, javert, …) → pocket-tts,
  everything else → kokoro-fastapi
- Dockerfile: runner stage switched from distroless/static to alpine:3.21
  with ffmpeg + ca-certificates installed
- homelab compose: runner gets POCKET_TTS_URL=http://pocket-tts:8000
- Doppler prd + prd_homelab: KOKORO_URL=https://tts.libnovel.cc,
  POCKET_TTS_URL=https://pocket-tts.libnovel.cc
2026-03-27 16:17:13 +05:00

48 lines
2.1 KiB
Docker

# syntax=docker/dockerfile:1
FROM golang:1.26.1-alpine AS builder
WORKDIR /app
# Download modules into the BuildKit cache so they survive across builds.
# This layer is only invalidated when go.mod or go.sum changes.
COPY go.mod go.sum ./
RUN --mount=type=cache,target=/root/go/pkg/mod \
go mod download
COPY . .
ARG VERSION=dev
ARG COMMIT=unknown
# Build all three binaries in a single layer so the Go compiler can reuse
# intermediate object files. Both cache mounts are preserved between builds:
# /root/go/pkg/mod — downloaded module source
# /root/.cache/go-build — compiled package objects (incremental recompile)
RUN --mount=type=cache,target=/root/go/pkg/mod \
--mount=type=cache,target=/root/.cache/go-build \
CGO_ENABLED=0 GOOS=linux go build \
-ldflags="-s -w -X main.version=${VERSION} -X main.commit=${COMMIT}" \
-o /out/backend ./cmd/backend && \
CGO_ENABLED=0 GOOS=linux go build \
-ldflags="-s -w -X main.version=${VERSION} -X main.commit=${COMMIT}" \
-o /out/runner ./cmd/runner && \
CGO_ENABLED=0 GOOS=linux go build \
-ldflags="-s -w" \
-o /out/healthcheck ./cmd/healthcheck
# ── backend service ──────────────────────────────────────────────────────────
FROM gcr.io/distroless/static:nonroot AS backend
COPY --from=builder /out/healthcheck /healthcheck
COPY --from=builder /out/backend /backend
ENTRYPOINT ["/backend"]
# ── runner service ───────────────────────────────────────────────────────────
# Uses Alpine (not distroless) so ffmpeg is available for WAV→MP3 transcoding
# when pocket-tts voices are used.
FROM alpine:3.21 AS runner
RUN apk add --no-cache ffmpeg ca-certificates && \
addgroup -S appgroup && adduser -S appuser -G appgroup
COPY --from=builder /out/healthcheck /healthcheck
COPY --from=builder /out/runner /runner
USER appuser
ENTRYPOINT ["/runner"]