chore: separate export commands (#28)

Signed-off-by: tison <[email protected]>

influxdb-v1-to-greptime/README.md

@@ -11,9 +11,18 @@ You need to be able to access your InfluxDB engine path, which contains your dat
 3. Export the necessary environment variables:
 
 ```shell
-export GREPTIME_DB="<dbname>"
 export GREPTIME_HOST="<host>"
+```
+
+```shell
+export GREPTIME_DATABASE="<dbname>"
+```
+
+```shell
 export GREPTIME_USERNAME="<username>"
+```
+
+```shell
 export GREPTIME_PASSWORD="<password>"
 ```
 

influxdb-v2-to-greptime/README.md

@@ -15,9 +15,18 @@ You need to be able to access your InfluxDB engine path, which contains your dat
 3. Export the necessary environment variables:
 
 ```shell
-export GREPTIME_DB="<dbname>"
 export GREPTIME_HOST="<host>"
+```
+
+```shell
+export GREPTIME_DATABASE="<dbname>"
+```
+
+```shell
 export GREPTIME_USERNAME="<username>"
+```
+
+```shell
 export GREPTIME_PASSWORD="<password>"
 ```
 

node-exporter/README.md

@@ -18,8 +18,17 @@ First of all, let's get a free GreptimeDB service:
 
 ```shell
 export GREPTIME_HOST="<host>"
+```
+
+```shell
 export GREPTIME_DATABASE="<dbname>"
+```
+
+```shell
 export GREPTIME_USERNAME="<username>"
+```
+
+```shell
 export GREPTIME_PASSWORD="<password>"
 ```
 
@@ -86,6 +95,10 @@ cd prometheus-2.53.1.darwin-arm64
 
 Modify the `prometheus.yml` file with:
 
+> [!TIP]
+>
+> If you switch to a new session, you need to re-export the environment variables as in [Step 1](#step-1-set-up-greptimedb-service).
+
 ```bash
 cat <<END > prometheus.yml
 global:

telegraf-ingestion/README.md

@@ -14,8 +14,17 @@ GreptimeDB supports both InfluxDB V1 and V2 ingestion APIs. To simplify the conf
 
 ```shell
 export GREPTIME_HOST="<host>"
+```
+
+```shell
 export GREPTIME_DATABASE="<dbname>"
+```
+
+```shell
 export GREPTIME_USERNAME="<username>"
+```
+
+```shell
 export GREPTIME_PASSWORD="<password>"
 ```