add jq / yq

Dockerfile

@@ -9,11 +9,16 @@ RUN go build -o /usr/bin/mautrix-whatsapp
 
 FROM alpine:3.12
 
+ARG TARGETARCH=amd64
+ARG YQ_DOWNLOAD_ADDR=https://github.com/mikefarah/yq/releases/download/3.3.2/yq_linux_${TARGETARCH}
+
 ENV UID=1337 \
     GID=1337
 
 RUN echo "@edge_community http://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories
-RUN apk add --no-cache ffmpeg su-exec ca-certificates olm@edge_community
+RUN apk add --no-cache ffmpeg su-exec ca-certificates olm@edge_community bash jq curl && \
+    curl -sLo yq ${YQ_DOWNLOAD_ADDR} && \
+    chmod +x yq && mv yq /usr/bin/yq
 
 COPY --from=builder /usr/bin/mautrix-whatsapp /usr/bin/mautrix-whatsapp
 COPY --from=builder /build/example-config.yaml /opt/mautrix-whatsapp/example-config.yaml