fix folder name for db adapter

apps/db-adapter/dockerfile

@@ -0,0 +1,20 @@
+FROM --platform=$BUILDPLATFORM golang:alpine AS build
+
+WORKDIR /app
+
+COPY . .
+
+RUN go get ./...
+
+RUN go generate ./...
+
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o db-adapter
+
+RUN apk update && apk add ca-certificates && update-ca-certificates
+
+FROM --platform=$TARGETPLATFORM busybox:1.36.1
+
+COPY --from=build /etc/ssl/certs /etc/ssl/certs
+COPY --from=build /app/db-adapter /app/
+
+CMD [ "/app/db-adapter" ]