Add docker container for integration tests

Dockerfile

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+FROM rust:latest
+
+# Copy a source code
+COPY web-client /build/web-client
+COPY near-client /build/near-client
+COPY common-api /build/common-api
+
+WORKDIR /build/web-client
+
+# Install the latest wasm-pack
+RUN cargo install wasm-pack
+RUN apt-get update && apt-get upgrade
+
+# Install chrome and driver for headless tesitng
+RUN apt-get install -y chromium
+RUN apt-get install -y chromium-driver
+
+CMD wasm-pack test --headless --chrome --test integration

docker-compose.yml

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+version: "3.9"
+
+services:
+  tests:
+    build:
+      context: .
+    image: client-tests
+    container_name: client-tests
+    networks:
+      - excahnge-server
+
+networks:
+  excahnge-server:
+    name: excahnge-server-network
+    external: true