fixed docker file placement

build/dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.26-alpine AS build
+WORKDIR /src
+ARG GO_PROXY=https://proxy.golang.org/
+ENV GOPROXY=${GO_PROXY}
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 go test ./... && \
+    CGO_ENABLED=0 go build -trimpath -buildvcs=false -ldflags="-s -w" -o /out/teammate ./cmd/server
+
+FROM alpine:3.22
+RUN addgroup -S app && adduser -S -G app app
+WORKDIR /app
+COPY --from=build /out/teammate /usr/local/bin/teammate
+RUN mkdir -p /data && chown app:app /data
+USER app
+ENV APP_ADDR=:8080 DATABASE_PATH=/data/teammate.db APP_TIMEZONE=Asia/Tehran SESSION_SECURE=true
+EXPOSE 8080
+VOLUME ["/data"]
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -q -O - http://127.0.0.1:8080/healthz || exit 1
+ENTRYPOINT ["teammate"]