Improve the file importer (#415)

Improve the bulk importer (tags by filename, document language, Docker container)

docs-importer/Dockerfile

@@ -0,0 +1,17 @@
+FROM node:14.2-alpine AS builder
+WORKDIR /build
+COPY node_modules/ ./node_modules/
+COPY main.js package-lock.json package.json ./
+RUN npm install && npm install -g pkg
+RUN pkg -t node14-alpine-x64 .
+
+FROM alpine
+ENV TEEDY_TAG= TEEDY_ADDTAGS=false TEEDY_LANG=eng TEEDY_URL='http://localhost:8080' TEEDY_USERNAME=username TEEDY_PASSWORD=password
+RUN apk add --no-cache \
+    libc6-compat \
+    libstdc++ 
+ADD pref /root/.config/preferences/com.sismics.docs.importer.pref
+ADD env.sh /
+COPY --from=builder /build/teedy-importer ./
+
+CMD ["/bin/ash","-c","/env.sh && /teedy-importer -d"]